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Updated: Jun 12, 2026

Wideband Optical Detector of Ultrasound for Medical Imaging Applications
Published on: May 11, 2014
Note: A frequency modulated wireless interrogation system exploiting narrowband acoustic resonator for remote
C Droit1, G Martin, S Ballandras
1Time and Frequency Department, FEMTO-ST, 32 Avenue de l'Observatoire, Besançon 25044, France.
Abstract:
We demonstrate the wireless conversion of frequency modulation to amplitude modulation by radio frequency resonators as means of accurately determining the resonance frequency of passive acoustoelectronic sensors. The emitted frequency modulated radio frequency pulses are generated by a pulsed radar for probing a surface acoustic wave based sensor. The sharp sign transition of the amplitude modulated received signal provides a signal on which a feedback loop is locked to monitor the resonance signal. The strategy is demonstrated using a full software implementation on a generic hardware, resulting in 2 Hz resolution at 1 s integration time limited by the proportional feedback loop.
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